Yellow Diamond (Faceted)
Diamond (pure carbon) with nitrogen impurities, C
mineral
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
Angelite
Anhydrite (Calcium Sulfate, CaSO4)
mineral
Ruby (Raw Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Mineral equivalent / Metal Alloy
Ruby (Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Green Tourmaline
Elbaite - Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
mineral
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
sedimentary
Quartz (Iron-stained or Rose variant)
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Granitic Pegmatite (Muscovite and Quartz)
Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)
igneous
Gold-bearing Quartz
Auriferous Quartz (SiO2 with Native Gold inclusion)
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)
sedimentary
Diamond in Gold Setting
Diamond (C - pure carbon)
mineral
Mica Schist
Mica Schist
metamorphic
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Banded Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary (secondary classification for a weathered mineral specimen)
Basalt
Basalt (containing Pyroxene, Plagioclase feldspar, and Olivine)
igneous
Citrine Quartz
Crystalline Quartz (SiO2 with iron impurities)
mineral
Banded Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Chert (specifically Jasper/Brown Chert)
Silicon Dioxide (SiO2)
sedimentary
Basalt
Mafic Igneous Rock
igneous
Jasper and Agate
Microcrystalline Quartz (SiO2)
sedimentary
Diamond
Carbon (C)
mineral
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)
sedimentary
Agate (River Pea)
Microcrystalline Chalcedony (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Diamond
Carbon (C)
mineral
Yellow Diamond
Diamond (Carbon, C)
mineral
River Pebble (likely Quartzite or Chert)
Silicon Dioxide (SiO2) crystal conglomerate
sedimentary or metamorphic
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Quartz (Tumbled/Polished Pebble)
Silicon Dioxide (SiO2)
mineral
White Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
mineral